Commit Graph

15 Commits

Author SHA1 Message Date
Georg Brandl ac4018ae39 Use try-except-finally in contextlib. 2007-08-23 18:11:33 +00:00
Nick Coghlan afd5e63e24 Finish bringing SVN into line with latest version of PEP 343 by getting rid of all remaining references to context objects that I could find. Without a __context__() method context objects no longer exist. Also get test_with working again, and adopt a suggestion from Neal for decimal.Context.get_manager() 2006-05-03 13:02:47 +00:00
Guido van Rossum da5b701aee Get rid of __context__, per the latest changes to PEP 343 and python-dev
discussion.
There are two places of documentation that still mention __context__:
Doc/lib/libstdtypes.tex -- I wasn't quite sure how to rewrite that without
spending a whole lot of time thinking about it; and whatsnew, which Andrew
usually likes to change himself.
2006-05-02 19:47:52 +00:00
Brett Cannon 1e01397533 Fix docstring for contextfactory; mentioned old contextmanager name. 2006-04-29 21:29:50 +00:00
Nick Coghlan a7e820a408 Move the PEP 343 documentation and implementation closer to the
terminology in the alpha 1 documentation.

 - "context manager" reverts to its alpha 1 definition
 - the term "context specifier" goes away entirely
 - contextlib.GeneratorContextManager is renamed GeneratorContext

There are still a number of changes relative to alpha 1:

  - the expression in the with statement is explicitly called the
    "context expression" in the language reference
  - the terms 'with statement context', 'context object' or 'with
    statement context' are used in several places instead of a bare
    'context'. The aim of this is to avoid ambiguity in relation to the
    runtime context set up when the block is executed, and the context
    objects that already exist in various application domains (such as
    decimal.Context)
  - contextlib.contextmanager is renamed to contextfactory
    This best reflects the nature of the function resulting from the
    use of that decorator
  - decimal.ContextManager is renamed to WithStatementContext
    Simple dropping the 'Manager' part wasn't possible due to the
    fact that decimal.Context already exists and means something
    different. WithStatementContext is ugly but workable.

A technically unrelated change snuck into this commit:
contextlib.closing now avoids the overhead of creating a
generator, since it's trivial to implement that particular
context manager directly.
2006-04-25 10:56:51 +00:00
Nick Coghlan da2268feec Fix contextlib.nested to cope with exit methods raising and handling exceptions 2006-04-24 04:37:15 +00:00
Phillip J. Eby 93149d935d Minor clarity edit to contextlib per Guido's request. 2006-04-10 17:56:29 +00:00
Phillip J. Eby 9388020b86 Fix typos; enhance comments on patch for SF #1462485.
--This line, and those below, will be ignored--

M    contextlib.py
2006-04-03 21:20:07 +00:00
Phillip J. Eby 9444bd51c4 Fix SF#1462485: StopIteration raised in body of 'with' statement suppressed 2006-04-03 20:05:05 +00:00
Phillip J. Eby 35fd142435 Fix contextlib not copying function attributes 2006-03-28 00:07:24 +00:00
Phillip J. Eby ccc7bb4ef2 More extensive comment on __exit__ handling, per Guido's request. 2006-03-25 04:32:12 +00:00
Phillip J. Eby 6edd258608 Fix a problem with @contextmanager not detecting a broken generator
that yields after a throw().  Make @contextmanager not reraise
exceptions, but return a false value in that case instead.  Add test
cases for both behaviors.
2006-03-25 00:28:24 +00:00
Guido van Rossum f669436189 Um, I thought I'd already checked this in.
Anyway, this is the changes to the with-statement
so that __exit__ must return a true value in order
for a pending exception to be ignored.
The PEP (343) is already updated.
2006-03-10 02:28:35 +00:00
Guido van Rossum a9f068726f Fix a bug in nested() - if one of the sub-context-managers swallows the
exception, it should not be propagated up.  With unit tests.
2006-03-01 17:10:01 +00:00
Guido van Rossum 1a5e21e033 Updates to the with-statement:
- New semantics for __exit__() -- it must re-raise the exception
  if type is not None; the with-statement itself doesn't do this.
  (See the updated PEP for motivation.)

- Added context managers to:
  - file
  - thread.LockType
  - threading.{Lock,RLock,Condition,Semaphore,BoundedSemaphore}
  - decimal.Context

- Added contextlib.py, which defines @contextmanager, nested(), closing().

- Unit tests all around; bot no docs yet.
2006-02-28 21:57:43 +00:00